Skye Drynan - Jun 25, 2025 Form 4 Insider Report for Gossamer Bio, Inc. (GOSS)

Role: Director
Signature: /s/ Jeff Boerneke, Attorney-in-Fact
Stock symbol: GOSS
Transactions as of: Jun 25, 2025
Transactions value $: $0
Form type: 4
Date filed: 6/26/2025, 04:35 PM
Previous filing: Mar 12, 2024
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Drynan Skye	Director	3115 MERRYFIELD ROW, SUITE 120, SAN DIEGO	/s/ Jeff Boerneke, Attorney-in-Fact	2025-06-26	0002015102

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	GOSS	Stock Option (Right to Buy)	Award	$0	+115K		$0.00	115K	Jun 25, 2025	Common Stock	115K	$1.36	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Award made pursuant to Non-Employee Director Compensation Program.
F2	The entire number of shares subject to this option becomes fully vested and exercisable on the first to occur of (a) the first anniversary of the grant date or (b) the next occurring annual meeting of the Issuer's stockholders, subject to the Reporting Person's continued service on the board of directors of the Issuer through such vesting date.